https://youtu.be/oOpkonSXMHk Is your Windows 10 Start Menu not working? Does Cortana fail to open? Microsoft released a fix that should help get you back up and running. Link to the program: http://aka.ms/diag_StartMenu

https://youtu.be/rLhBJQdu6Kc When using "Step Backward" with Control + Alt + Z, Photoshop will allow you to undo one action at a time. By default, you can only undo about 10-20 times. However, you can manually change this to any number you want, allowing you to undo even further into the file's history.